I'm hard-pressed to think of a single place where it would be cheaper to buy gas on the Canadian side of the border. Mostly it's not even close. It used to be common for Canadians to cross the border just to buy gas, but of course in this brave new ultra-secure world we live in, it's no longer worth the hassle a lot of times.

Re: cooler of beer:


http://www.cbsa-asfc.gc.ca/travel-vo...vc-eng.html#a4